Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.

Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.

Explanation:

Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.